Computing machine



1943- o. J. SUNDSTRAND ,30

COMPUTING MACHINE Filed Dec. 24, 1938 5 Sheets-Sheet 1 CD 300-- SPACERTOTAL 9.60

TOTAL INVENTOR 0504/? SUNDSTRAND 5 Sheets-Sheet 2 Jan. 26, 1943. o. J.SUNDSTRAND COMPUTING MACHINE Filed Dec. 24, 1958 d 3 r .3 Q \Q .2 w 5 B8% gm Q \m 3 A Q g \..L......" .AR\ 4. -..H.. Q m R.\ W), i 1\ -J .IN .2R T Y wa NQ 5 n. E m% w QQ r n km. Q m S o m w A E v x 4 0 22 w \QNX g 3ma Jan. 26, 1943. o. J. SUNDSTRAND 2,309,282

COMPUTING MACHINE Filed Dec. 24, 1938 5 Sheets-Sheet 3 lNV ENTOR ,z0504/? J. Jl/NRSTRAIVD I TTORNE Jan. 26, 1943.

o. J. SUNDSTRAND COMPUTING MACHINE Filed Dec. 24, 1938 5 Sheets-Sheet 4INVENTOR OSCAR J SUNDSTRAND ATTOR N EY Jan. 6, 1943- o. J. SUNDSTRAND Y2,309,282

COMPUTING MACHINE Filed Dec. 24, 1958 5 Shee'ts-fiheet 5 INVENTOR OSCARJ. SUNDSTRANL BY A w /i 4- i I A: {)1 IA/Qt'%/M W ATTORNEY Patented Jan.26, 1943 COMPUTING MACHINE Oscar],- Sundstrand, West Hartford, Conn, as-

signoi' to Underwood Elliott Fisher Company, New York, N. Y., acorporation of Delaware Application December 24, 1938, Serial No.247,598

5 Claims.

This invention relates to computing machines, and more particularly tomechanisms for obtaining true negative totals from a single adding andsubtracting totalizer.

It is well known that to obtain such a total on the type of machineillustrated here, it is necessary to introduce a quantity known commonlyas a fugitive 1. This fugitive 1 may be introduced in different ways,the one being employed in the present instance operating as follows.

Whenever the .totalizer is shifted from its adding position to itssubtracting position, 1 is subtracted, and whenever it is returned fromits subtracting position to its adding position, 1 is added. By doingthis, if a total is taken when the 'totalizer is in its subtractingposition (as is always the case in taking a negative total), thefugitive "1" is properly subtracted without any attention on the part ofthe operator.

It is also well known that to obtain a negative total without specialattention on the part of the operator, it is necessary to have theshifting of the totalizer .to its subtracting position controlledautomatically by the totalizer (according to its positive or negativecondition), this automatic control of the shifting being customarilyperformed during a blank cycle immediately following the entry of thelast item.

In mechanisms of this character it is therefore necessary at times (whenthe last item was a positive entry, but the total is negative, or viceversa) to shift the totalizer during the blank cycle, the shiftingincidentally causing the entry of the fugitive 1.

In many types of machines, the entry of a fugitive l, or in fact theentry of any amount, may leave the actuating racks or transfermechanism, or both, in a condition that is not proper for taking atotal. It is, therefore, necessary in such machines to operate themachine through a second blank cycle before the total can be taken.

This requirement of two blank cycles prior to the taking of a total hasbeen found very objectionable, especially in types of work necessitatingthe taking of totals at frequent intervals. It is, therefore, an objectof the present invention to relieve this condition by providing amechanism that will properlycondition machines of this'character for thetaking of a negative total after one, instead of two blank cycles.

With this and incidental objects in view, the invention consists incertain novel features of construction and combinations of parts, theessential elements of which are set forth in appended claims, and apreferred embodiment of which is hereinafter described with reference tothe drawings which accompan and form part of the specification.

In the drawings:

Figure 1 is a perspective view of a computing machine embodying theinvention,

Figure 2 is a diagrammatic view of the keyboard thereof,

Figure 3 is a right side elevation of the totalizer and the fugitive "1entering mechanism, showing the position of the parts immediatelyfollowing the insertion of the fugitive 1,

Figure 4 is a view similar to Figure 3 but with the parts restored,

Figure 5 is a perspective of the mechanism for automaticallyconditioning the totalizer to take a negative total,

Figure 6 is a right side elevation of mechanism used in restoring theracks and stop pawls.

Figure 7 is a view similar to Figure 6 but with the parts in theiractuated positions,

Figure 8 is a diagrammatic view of the total izer in condition to add anamount,

Figure 9 is a view similar to Figure 8 but with the totalizer shown insubtractive condition, the

fugitive 1 pawl having been tripped,

Figure 10 is a view similar to Figure 9 but with the totalizer justabout to be placed in adding condition during a blank cycle and justabout to trip the mechanism for introducing the fugitive 1 additively,

Figure 11 is a view similar to Figure 10 but showing the totalizer inneutral position and the units rack and fugitive "1" mechanism beingrestored by depression of a total key,

Figure 12 shows a portion of a'record strip illustrating the type ofwork done by the machine,

Figure 13 is a perspective view of one of the parts shown in Figures 3and 4, and

Figure 14 is a perspective view of some of the parts shown in the lowerright hand corner of Figures 3 and 4.

GENERAL DESCRIPTION The invention is herein exemplified in con- Inection with mechanism of the general character disclosed in the U. S.Patents No. 1,198,487, issued to Gustaf D. Sundstrand. and Nos.l.583,102, 1,965,611. 2,004,495 and 2,088,982, issued toOscar J.Sundstrand.

On this class of machine. accumulating operatlons are. performed byindexing in the keyboard the amount that is to be listed andaccumulated, and starting the machine by depressing the motor bar. Stopsset by the amount keys arrest the type bars during their upward movementin positions wherein the numeral type corresponding to the amountindexed is in position to print. Adding and subtracting racks carried bythe type bars are arranged for movement therewith.

Prior to the up-stroke of the racks in an accumulating cycle, thetotalizer is moved to a neutral position intermediate the two sets ofracks, and just prior to the down-stroke of the racks the totalizer isengaged with whichever set of racks is to be used in the accumulatingoperation.

An enforced blank cycle prior to a total cycle insures the resetting ofany transfer pawls which may have been tripped during the preceding.accumulating cycles, and automatically engages the totalizer with theproper set of racks in accordance with the positive or negativecharacter of the total to be taken.

During the total cycle, the totalizer wheels are in mesh with theselected set of racks during the up-stroke of the latter. Therefore, asthe transfer lugs carried by the wheels abut the under side of theirassociated transfer pawls. their corresponding type bars are arrested inposition for printing the totals which have been accumulated in thetotalizer.

Since an error of 1 occurs whenever the totalizer overdrafts, a meansmust be provided to correct this error. This means includes a tumblerarranged to be oscillated alternately clockwise and counter-clockwise,as the totalizer shifts from one set of racks to the other. Suchmovement of the tumbler causes it to trip a pawl associated with theunits order rack of the set of racks engaged, whereby the units rack ispermitted to descend a distance of one tooth to additively orsubtractively accumulate, as the case may be, the fugitive l in theunits wheel.

In the ordinary course of operations, this accumulation of the fugitive1 trips one or more transfer pawls and actuating racks that are notrestored until the next cycle. Further, it may happen that the amount ofthe last item of a group to be totaled is of opposite character to, andless than the aggregate amount of the preceding accumulated items.dition, when the machine is operated through the blank cycle tocondition the totalizer for taking a total, the movement of thetotalizer from one set of racks to the other causes the fugitive 1 pawlto trip and thereby introduce the necessary fugitive 13 as in the normalcourse of operations, but, since the entry of the fugitive 1 leaves oneor more parts out of normal position, another blank cycle is necessarybefore the total can be taken.

To obviate the necessity of two blank cycles before taking a total,mechanism operable by depression of either the total or sub-total key,after a single blank cycle is taken, is provided to restore any racks orpawls that are out of normal position.

DETAILED DESCRIPTION INDEX or Torres 1. The machine sections andactuating mechanism generally.

2. Mechanism for shifting the totalizer 3. Transfer mechanism generally.

4. Fugitive l entering mechanism.

Under such a con- 5. Automatically conditioning the totalizer for takinga negative total.

6. Mechanism for restoring racks and stop pawls by depression of thetotal keys.

1. The machine sections and actuating mechaism generally Referring toFigures 1 and 2, the machine ineludes the usual keyboard I having amountkeys 2. a subtract key 8, total and sub-total keys 4 and 5,respectively, a carriage 8 supporting the platen 1 around which thepaper is guided, type bars 8 for printing on the paper, a motor 9, and amotor bar ID.

Type bars 8 are arranged for vertical movement, and each carries a pairof depending actuating racks II and I! (Figure 3) lying on oppositesides of the totalizer indicated generally at IS. The totalizer includesa plurality of 20- tocth wheels I (there being one wheel for each typebar 8), journaled for free rotary movement on a shaft l5. Shaft I5 isarranged to be shifted forwardly and rearwardly to engage wheels l4 witheither of the sets of racks. The set of racks represented by rack II iseffective to rotate the wheels in a clockwise direction for accumulationof additive amounts, and the set of racks represented by the rack I2 iseffective to rotate the wheels in a counter-clockwise direction for theaccumulation of subtractive amounts.

Normally, the wheels are engaged with adding racks ll. When an itemindexed on keys 2 (Figure 1) is to be added, wheels ll are moved toneutral position, i. e., between the two sets of racks, before type bars8 are raised to print the item. The wheels are moved back intoengagement with racks Ii just before the bars are moved downwardly.Addition, therefore, is accomplished on the downstroke of the racks, andthe extent of rotation of the wheels ll corresponds to the extent ofrise of the type bars in accordance with the amount indexed.

Depression of subtraction key 3, following the indexing of an item,conditions mechanism that causes the wheels H to move from neutralposition into engagement with subtraction racks 12 just before thelatter descend, whereby subtraction of the item is accomplished on thedownstroke.

To take a total, the total key 4 is depressed and the machine operated.During this operation, wheels II are engaged with the set of racksselected during the blank cycle preceding the total cycle, so thatduring the upstroke of the racks, the total is cleared from the wheels.They are withdrawn from engagement with the racks just before the racksdescend, and are re-engaged at the very end of the operation.

Depression of sub-total key 3 conditions mechanism that allows wheels I!to be engaged with the racks during the entire cycle, so that the amounttaken from the wheels during the ascent of the racks is restored duringthe descent.

The machine is actuated by the motor 9. The motor is started by theclosing of suitable switch mechanism, and is coupled with an actuatingshaft [6 (Figure 6) by a suitable clutch mechanism upon depression ofmotor bar l0 (Figure 1). The actuating shaft is coupled with the motordrive in such a manner that it is rocked, first counter-clockwise(Figure 6) and then clockwise, about ninety degrees, to actuate the typebars 8 and impart the necessary movements to the key controlledmechanisms above described.

All the before-mentioned features are common to the Sundstrand patentsmentioned above, and to which reference may be had for a more detaileddescription.

2. Mechanism for shifting the totalizer The mechanism for moving wheelsl4 into and out of mesh with racks ii and I2 to accomplish theoperations above outlined, is identical with that disclosed in thepreviously mentioned Patent No. 1,965,611. A pair of links, such as 2|,(Figures 5 and 6) are pivoted on their forward ends to the opposite endsof shaft l5. The rear ends of links 2| are pivoted as at 22 to the lowerends of two levers, such as 23, which are rigidly secured to a shaft 24journaled in the framework of the machine.

When levers 23 are in the position shown in Figures 5 and 6, wheels I4are in mesh with adding racks II. The means herein shown for swinginglevers 23 to move the wheels into and out of mesh with the rackscomprises a link 25,

the forward end of which is supported by a lever 25 pivoted on a stud21. The rear end of link 25 is provided with notches 23 and 29 toreceive pins and 3|, respectively, on the opposite ends of the right.hand lever 23. Rearwardly of the notches 28 and 29 are lugs 32 and 33,respectively, which serve to prevent disengagement of lever 23 from link25. Forwardly of notches 28 and 29 are curved surfaces arranged to slidein contact with pins 30 and 3|. Link 25 is moved forward and back bymeans of a cam plate 34 (Figure 6), pivoted at 36 and having a cam slottherein, the upper portion of the slot being concentric with the axis 35of the plate. On the forward end of the link 25 is a roller 31 that liesin slot 35. Cam 34 is arranged to be oscillated about its axis 35 duringeach cycle of the machine, by means of a reversible pawl mechanism (notshown) having connection with actuating shaft It as fully disclosed inPatent No. 1,965,611. By these parts, as cam 34 swings upwardly duringthe first half of the cycle, link 25 is drawn forwardly and levers 23are swung clockwise about shaft 24, whereby wheels M are withdrawn fromengagement with racks I before the latter rise; and when cam 34 swingsdownwardly, during the latter half of the cycle, link 25 is thrustrearwardly, whereby levers 23 are rocked counter-clockwise of shaft 24,and wheels 4 are brought into engagement with racks before they descend,

Link 25 is connected with subtraction key a by means of a lever 33(Figure 5) pivoted at 33 in the machine frame. Lever 33 is provided atits rear end with a recess 40 arranged to embrace a pin 4| on link 25,and has a downwardly extending arm 42 carrying a pin that lies in a slot45 in a slide 44. A spring 43 connected between slide 44 and lever 33normally tensions the pin against the rear end of slot 45. Th forwardend of slide 44 is pivoted to a depending arm of a lever 41 pivoted on astud 43. Lever 41 has a forwardly extending arm 43 underlying a p. n 53in a plate 5| secured to the stem of the subtraction key 3. A spring 52connected betwem plate 5| and the machine frame normally tensions key 3upwardly, and a spring 53 connected between the lower arm of lever 41and the machine frame normally tensions the lever clockwise about stud43, so that arm 43 rests against pin 50. When the parts are in thenormal position shown in Figure 5, tension of spring 53 urges slide 44forwardly and causes lever 33 to hold notch 23 of link 25 in engagementwith pin 3|.

When an amount is to be subtracted, depression of key 3 rocks lever 41,which in turn thrusts slide 44 rearwardly, moving the rear end of slot45 away from pin 46 and tensioning lever 33 upwardly. Then, when levers23 are rocked clockwise at the beginning of the cycle, and notch 23 isbrought opposite pin 30, lever 33 thrusts link 25 upwardly, so that thisnotch and pin engage, as notch 29 disengages from pin 3|.

Hence, as cam 34 (Figure 6) starts to rock downwardly at the beginningof the second half of the cycle, levers 23 are rocked clockwise of shaft24 instead of counter-clockwise and wheels H are engaged withsubtraction racks l2 instead of adding racks A latch indicated at 54(Figure 5) is provided to maintain lever 41 and the associated parts intheir operated positions to effect this result, a hook 54 on lever 41engaging a stud 55 on the key stem to hold the key depressed. At thecompletion of the cycle. latch 54 is released. allowing the parts torestore under the influence of their respective springs.

If, on the ensuing cycle, key 3 is again depressed, wheels l4 aredisengaged from racks l2 at the beginning of the cycle and arere-engaged with them at the beginning of the second half of the cycle,as before. In the event key 3 is not depressed for the ensuing cycle,link 25 ceases to be tensioned upwardly. Hence, when wheels H aredisengaged from racks |2 at the beginning of the cycle, notch 29re-engages pin 2|, so that wheels l4 are engaged with racks instead ofracks l2 during the latter portion of the cycle.

When a total is to be printed, wheels H are retained in mesh (except fora brief interval to be later explained) with the set of racks with whichthey were left engaged at the completion of the blank cycle precedingthe total cycle, so that the wheels may be turned to zero during thefirst half of the machine cycle. At the beginning of the last half ofthe cycle, cam 34 i rocked counter-clockwise to withdraw wheels fromengagement with the racks, so that they may remain cleared. However, ifa sub-total is being taken, cam 34 is not rocked at the beginning of thesecond half of the cycle. and wheels N there-- fore remain engaged withthe racks, so that during the downstroke the amount of the total whichhas been printed is returned to the totalizer.

3. Transfer mechanism generally Referring now particularly to Figure 3,the sets of racks H and |2 are connected to type bars 3 by individualpin-and-slot connections that per- .mit one step of movement of eachrack relative to its type bar. The racks are guided for verticalmovement in slots 54 formed on inwardly facing surfaces of a pair ofsimilar bars 55 (Figure 3.), which extend longitudinally of thetotalizer and which are supported in the machine frame.

Each rack is provided with a lug 55 which moves in the vertical plane ofits respective bar 55, and which is arranged to be arrested by the barto define the lowermost position of the racks.

Two rods 51 are supported in the machine frame at opposite sides of thetwo sets of racks, and operatively support a plurality of stop pawls 53,one such pawl being provided for each rack. Each pawl 53 is formed witha lug 59 arranged to co-act with lug 56 on their respective racks tosupport the latter one step of movement above bars 55. To the lower endof each pawl 88 is pivoted a dog 60, having a tooth 6| engaging the edgeof the adjacent bar 55.

Each of the wheels ll has two diametrically opposed lugs 82 fixed to oneside thereof and which are arranged to disengage the teeth 6| from thebar 55. When an amount registered by a wheel reaches nine, continuedrotation of that wheel as its rack descends brings one of the lugs 62against the upper edge of the end of the dog 88 associated with the nexthigher order rack, thereby depressing the dog until its tooth BI isclear of the bar 55, whereupon a spring 68 (assisted by the downwardpressure of a spring 84 of the said next higher order rack) moves thedog and pawl 58 away from the higher order rack. the latter then beingfree to drop the one tooth space, where it is stopped by contact of itslug 58 with bar 55.

Any transfer elements that are tripped during one cycle of the machineare normally restored during the next cycle. The pawls 58 and dogs 80are restored by a pair of rods 65 lying adjacent the dogs 60. Each rod85 is supported by two bell crank levers, such as 88, pivoted on rods51. The bell crank levers are connected for simultaneous swingingmovement by a pin-and-slot connection 67. The rods 85 are simultaneouslymoved toward and away from their associated dogs 88 by operation oi twoarms, such as 88, that are formed integrally with the right hand set ofhell crank levers 88. A rod 89 (H8 in Patent No. 1,965,611), lying inthe transverse plane of arms 88, is arranged for downward movement (asindicated by arrow) during the first half of each machine cycle. Suchdownward movement of this rod causes it to abut arms 68 and thereby rockbell crank levers 66 about their pivots to swing rods 65 inwardly, asshown in Figure 4, to restore any pawls 58 and dogs 88 that have beentripped. This restoring action takes place at a point in the machinecycle where any dropped bars will have been raised, so that their lugs58 are above the lugs 59 or" pawls 58 when the latter are restored.

The movement imparted to the type bars during a blank cycle prior to thetaking of a total raises lugs 238 sufficiently to permit the restorationstop lugs 59.

This construction is common to the Sundstrand patents previouslymentioned.

4. Fugitive 1 entering mechanism As previously stated, whenever atotalizer of the type in the present construction is changed from apositive to a negative condition, or vice versa, an error of 1 occurs inthe accumulated total. To correct this, mechanism is provided to enter 1in the units wheel ll every time the totalizer is shifted from theadding racks to the subtracting racks, or vice versa, so that when atotal is taken by one or the other set of racks, the fugitive 1" willhave been entered. This mechanism includes a tumbler 10 (Figure 3) whichis rotatably mounted on shaft I immediately adjacent the units orderwheel l4. Tumbler I8 is provided with oppositely disposed lugs ii,arranged to engage teeth SI of the dogs 89 that are connected with thepawls 58 associated with the units order racks Ii and i2.

A stationary pin 12 is held by the machine frame at a point midwaybetween racks H and I2, and projects inwardly into a recess 13 providedin tumbler 18. Movement of the totalizer from engagement with addingracks II, as shown in Figure 8, past neutral position and intoengagement with subtracting racks I2, as shown in Figure 9, causes theright end of recess II to strike pin 12 and rock tumbler 10counterclockwise about shaft l5 a distance sufllcient to cause lug II torelease dog 60 on the left from engagement with bar 55. This removesstop pawl lug 58 from beneath lug I8 and allows the units rack I2 todescend one step to subtractively accumulate the fugitive "1 in theunits orde. wheel ll. Upon shifting the totalizer from engagement withsubtracting racks II, as shown in Figure 9, past neutral position andinto engagement with adding racks II, the beginning of which movement isillustrated in Figure 10, the left end of recess 18 strikes pin 12 androtates tumbler l8 clockwise about shaft l5, causing the opposite lug Hto disengage the dog 88 on the right from bar 55 to additivelyaccumulate the fugitive "1 in the units order wheel M. It will be notedwith reference to Figures 10 and 11 that recess 18 is made sumcientlywide so that no rotative movement is imparted to tumbler '18 when thetotallzer is moved merely to neutral position from engagement witheither set of racks. The tripped stop pawl 58 and its associated dog arerestored during the next cycle by the transfer restoring mechanismdescribed in the preceding section.

5. Automatically conditioning the totalizer for taking a negative totalA mechanism similar to that disclosed in Patent No. 2,088,982 isprovided on this machine to insure the engagement of the totalizer withthe subtracting racks during the blank cycle preceding the taking of atotal, in the event that the totalizer has become overdrafted, i. e.,credit amounts accumulated have exceeded debit amounts.

This mechanism includes a bail H (Figure 5), the upper and lower arms ofwhich are pivoted on studs 15 secured in the machine frame. The upperarm of the ball has a universal connection with a lever 18 pivoted on anaxis Tl. Lever 18 has a suitable crank connection (not shown) with rockshaft l8 (Figure 6) whereby during each cycle of the machine the leveris swung to and fro about axis l1 and oscillates bail H. The lower armof the bail carries a yielding projection 18 arranged to lie directly infront of a stud 79 fixed in slide 44, whenever the bail is elevated aslight distance on studs 15. The means for so elevating bail 14comprises a bell crank 80 pivoted on a stud 8| and having a horizontalarm 82 underlying a pin 83 secured to the bail. A vertical arm 84 of thebell crank has an inturned flange 85 that normally, during each cycle ofthe machine, abuts a stop lever 88 pivoted as at 81 in the machineframe. A link 88 (numbered I016 in Patent No. 2,088,982), pivoted on astud 89 secured in arm 84, has connected thereto a spring 90 whichtensions flange 85 toward stop lever 86.

The rear end of lever 86 is forked and embraces a pin 8| fixed in anextension 92 of a plate 93 mounted for pivotal movement on a rod 94supported in the machine frame. The upper edge of plate 93 is embracedby a forked end of a link 95, which is connected by-pin-and-slotconnegtions with arms 98 pivoted on rods 51. Each arm 96 is providedwith a dog 91, similar to the dogs 80, and which is arranged to bedisengaged from its bar 55 by lugs 62 of the totalizer wheel I4 ofhighest order. A roller 98 on the lower end of lever 16 is arranged tobear against a flange 99 provided on arm 84 of bell crank 80 and holdflange 85 a short distance away from stop lever 86 when lever 11 is inits normal position shown in Figure 5. When an amount accumulated in thetotalizer represents a debit balance the parts are in the position shownin Figure 5. However, when the totalizer is overdrafted, the wheel I4 ofhighest order passes through zero, causing lug 62 to trip dog 91 on thesubtract side of the totalizer and to swing arm 96 clockwise about rod51 under tension of spring 63. This movement thrusts link 95 toward theright as viewed in Figure 5, rocks plate 93 clockwise about rod 94 andswings stop lever 86 downwardly about its pivot 81, out of the path offlange 85 of bell crank 84. Now, if a blank cycle is taken to conditionthe machine for a total operation, as roller 98 moves away from flange99 at the beginning of the cycle, bell crank 84 is free to swingclockwise about stud 8|, and arm 82 elevates bail 14, bringingprojection 18 into the plane of stud 19. Clockwise oscillation of bail14 then causes the projection to abut the stud and thrust slide 44rearwardly .to tension lever 38 upwardly. Hence, when levers 23 rockclockwise following the movement of the parts as just described, notch28 of link engages pin in the same manner as previously described.Therefore, wheels I4 are placed inv engagement with subtraction racks I2at the beginning of the last half of the cycle, preparatory to thetaking of th negative total on the succeeding cycle. At the end of thesecond half of the blank cycle, roller 98 again contacts flange 98 androcks bell crank 84 counterclockwise to its normal position.

Mechanism similar to that disclosed in Patent No. 2,088,982 is providedon the forward end of link 88 to prevent the link from coming forwardwhen an amount is indexed in the keyboard, so that even though stoplever 86 is lowered out of the path of flange 85 by virtue of thepresence of a negative balance in the totalizer, the latter will not beautomatically engaged with the subtraction racks for the accumulatingoperation.

6. Mechanism for restoring racks and stop pawls by depression of thetotal keys The automatic shifting of the totalizer from one set of racksto the other in accordance with the nature of the total to be takenoccurs during the blank cycle as above described, and causes tumbler 10to trip the fugitive 1 pawl of the set of racks engaged, to correct theerror of 1 as described above. However, since this insertion of thefugitive 1", like an ordinary transfer from one order to the next,leaves one or more of the actuating racks and transfer dogs out ofnormal position, a second blank cycle must be taken before the total,unless some other means is provided to restore these parts.

A means to restore these parts without requiring a second blank cycle,is provided in the present mechanism, and is operable by depression ofeither of the total keys. By this mechanism, depression of either totalkey withdraws totalizer I3 from engagement with the racks, re

stores any racks and dogs that are out of normal position, andre-engages the totalizer with the set ofracks from which it wasdisengaged.

Referring to Figure 6, total key 4 has secured on its stem a plate 88having a lug 89 overlying a forwardly extending arm 89"- of a bell crankI00 pivoted on a stationary rod IN. A bail I02 likewise pivoted on rodIOI has a horizontal arm lying beneath arm 89a and a vertical arm I03engaging a recess I04 in a lever I05 pivoted on a stud I06. A pawl I01is pivoted at I08 to lever I05 and has a shoulder I09 engaging a, pin II0 on a cam lever III journaled on rock shaft I6. A spring Ilz connectedbetween lever I05 and pawl I01 normally tensions the pawl clockwiseabout pivot I08 and holds shoulder I 09 in contact with pin I I0. Camlever I I I is provided with a slot I I3 embracing a roller II4 on camplate 34. The lower arm of cam lever II I has pivoted thereon a plateII5 tensioned counter-clockwise about its pivot by a spring II6, so thata projection II1 thereof bears against a pin II8 on a. crank arm II9secured to rock shaft I6. The rear end of pawl I01 has an extension I20lying in the path of a pin I2I on lever III. Depression of total key 4rocks bell crank I00 and bail I02 counterclockwise, and thereby swingslever I 05 clockwise about pivot I06, causing pawl I01 to rock lever IIIcounter-clockwise about shaft I6. This movement causes cam plate 34 torock counterclockwise about-its axis 36 and pull link 25 forward toshift totalizer I3 to neutral position as shown .in Figure 7. Duringthis movement,

spring H6 is stretched to place clockwise ten- 4 sion on lever III,plate II5 being held by projection II1 abutting pin H8. Thecounterclockwise movement of lever II I progresses until pin I2I strikesprojection I20 of pawl I01, whereupon shoulder I09 is removed fromengagement with pin IIO. This releases lever III to the action of springII6, the latter pulling the lever clockwise to re-engage totalizer I3with the set of racks from which it was just withdrawn.

Depression of key 4 causes a lug I22 on plate 88 to engage a latchindicated at I23 to hold the total key depressed and maintain otherparts (not shown) associated with the total taking mechanism in movedposition. At the end of the ensuing total cycle latch I23 is removed, inthe manner disclosed in Patent No. 1,965,611, and the parts are restoredunder tension of their respective springs, whereupon shoulder I09 againengages pin IIO.

A stud I24 secured in the stem of the subtotal key 5 overlies arm 88 ofbell crank I 00, so that depression of this key, also, imparts movementto the foregoing train of parts and effects a momentary disengagement oftotalizer I3 from racks II or I2. An arm I25 (Figure 6), havingpin-and-slot connections with sub-total key 5, is pivoted on rod IM andhas a forward projection I25 arranged to be engaged by latch I23 to holdthis key depressed during the ensuing total cycle.

Mechanism is provided for restoring any dropped racks II or I2 and theirassociated stop pawls 58 and dogs 60 while the totalizer is momentarilydisengaged from the racks.

This mechanism includes a pair of cradles I26 and I21 spanning the lowerends of the racks II and I2 respectively, and pivotally mounted on rodsI28 fixed in the machine frame. A link I28 (Figure 3) connects thecradles for parallel uniform rocking movement about rods I 28. A link I30 is connected at one end to cradle I26 and at its opposite end to anactuating arm I3I joumaled on a stationary rod I32 secured in themachine frame. A spring I33 connected mally tensions the armcounter-clockwise about rod I32, causing a square stud I34 fixed thereonto engage a shoulder provided in the vertical arm or a latch I35 pivotedon a stud I36. A spring 335*, connected between latch I35 and themachine frame, maintains the latch in its effective position shown inFigure 3. In this position, an upstanding beveled lug I 31, formed on ahorizontal arm of latch I35, lies in the path 01' a correspondinglybeveled stud I38 secured in the left totalizer shifting link 2|. A ballI39 (see also Figure 13), also Journaled on rod I32 adjacent arm I3I,has a depending arm I42 carrying a pin I43 arranged to be engaged by aspring tensioned latch I44 pivoted on rod I26 between the upstandingsides of cradle I26, whereby the bail is held against counter-clockwisemovement about rod I32 under tension 01 a spring I4I connected betweenthe bail and the machine frame. A pair of upstanding flanges, such asI40, provided on the bail, are arranged to rest against the stop pawlrestoring rod 65 when the bail is so latched.

When totalizer I3 is shifted to neutral position by depression of totalkeys 4 or 5, as above described, stud I38 bears against lug I31 and camslatch I35 counter-clockwise about rod I36, against the tension of springI35. This disengages the latch from stud I34 and releases arm I3I toswing counter-clockwise about rod I32 under tension of spring I33 tothrust link I30 toward the left, whereupon cradles I26 and I21 arerocked counter-clockwise about rods I28 and restore any dropped racks.During this movement, the right edge of cradle I26 strikes the loweredge or latch I44 and releases it from engagement with pin I43,whereupon bail I39 swings counter-clockwise about rod I32 under tensionof spring HI and flanges I40 thrust stop pawl restoring rods 65 inwardlytoward the racks to restore any tripped dogs 60 and stop pawls 58.

The movements just described are practically instantaneous, all takingplace while the totalizer I3 remains in neutral position, and before itre-engages the racks. It is apparent that stud I38 will effect releaseof latch I35 by movement of link 21 in either direction, 1. e., wheneverthe link is shifted from the racks I2 to neutral position, or from theracks II to neutral position, so that this restoring means is effectiveto either additively or subtractively complete the accumulation of afugitive l inserted during a blank cycle.

Means are provided for resetting cradles I26 and I21 and stop pawlrestoring bail I39 on the first succeeding accumulating cycle. Thismeans includes a pair of upstanding links I46 and I41 having slots 548through which passes a rod I49 (I in Patent No. 1,965,611). The link I46is pivoted at i53 to arm I3I, and link I41 is pivoted at I5I to an arml52 on bail I39. Rod I49, by suitable connections (not shown) with themain rock shaft I6 (Figure 6) is arranged to move, during each machinecycle, downwardly from its normal position shown in full lines in Figure3 during the first half of the cycle, to a position shown in dottedlines in this figure, and back to normal position during the last halfof the cycle. Referring now to Figure 4, it is seen that such downwardmovement thrusts links I46 and I41 downwardly, rocking arm I3I and bailI39 clockwise about rod I32 against the tension of their respectivesprings, and restoring cradles I26 and between arm I3I and the machineframe nor-- re-engaging stud I34 and latch I44 re-engaging pin I43.

Since, in the normal course of machine operations stud I36 strikes lugI31 and disengages latch I whenever totalizer I3 is moved to neutral.position, and since this would effect undesirable results, means mustbe provided to prevent the release of rack restoring cradles I26 and I21and stop pawl restoring bail I39 incident to the tripping of latch I35during these operations.

This means includes a stop arm I53 Journaled on a rod I54 and situatedbetween links I46 and I 41. A spring I55 connected to the upper end ofthe stop arm normally tensions the arm counter-clockwise about rod I54and against rod 69. The lower end of arm I53 moves in the plane I21 tothe position shown in Figure 3, latch I35 of a square stud I51 fixed inlink I46, and a yoke I56 of arm I53 straddles shaft 24. At the beginningof each cycle of the machine, as rod 63 swings downwardly from the fullline position shown in Figure 3 to the dotted line position, arm I53swings counter-clockwise about rod I54 the limited extent permitted byyoke I56. This amount of movement is suflicient to bring the lower endof arm I53 directly over stud I51. Consequently, since this occurs atthe very beginning of the cycle, by the time the totalizer has beenshifted to neutral position, and latch I35 released, arm I53 preventsarm I3I from rising, and thereby prevents actuation of restoring cradlesI26, I21 and I39.

While the form of mechanism herein shown and described is admirablyadapted to fulfill the objects primarily stated, it is to be understoodthat it is not intended to confine the invention to the one form ofembodiment herein disclosed, for it is susceptible of embodiment invarious forms, all coming within the scope of the claims which follow.

What is claimed is:

1. In a machine of the class described, a totalizer, actuating rackstherefor, a total key, means actuated by operation of the total key todisengage the totalizer from the racks, means to thereafter relieve thetotalizer of control by the total key, and a spring, tensioned byoperation of the total key, to return the totalizer to engagement withthe racks.

2. In a machine of the class described, a totalizer, actuating rackstherefor, a total key. means actuated by operation of the total key todisengage the totalizer from the racks, means to thereafter relieve thetotalizer of control by the total key, tens transfer elements movableinto tripped and normal positions, means to move any tripped transferelements into normal position after the totalizer is disengaged from theracks, and a spring tensioned by operation of the total key to thenreturn the totalizer to engagement with the racks.

3. In a machine of the class described, a totalizer, actuating rackstherefor, a total key, means actuated by operation of the total key todisengage the totalizer from the racks, transfor elements, each movableunder tension of a separate spring from normal to tripped positionsunder control of the totalizer wheels, spring actuated means forreturning any tripped transfer elements to their normal positionsagainst the tension of their springs, a latch to hold the transferelement restoring means in ineffective position, and an operativeconnection from the totalizer disengaging means to the latch to trip thelatch when the totalizer is moved into disengaged position.

4. In a machine of the class described, a 1

5. In a key set, motor operated machine of the class described, atotalizer, actuating racks therefor, a total key, and mechanical' means,actuated entirely by the energy applied by the operator in operating thetotal key, for disengaging the totalizer and actuating racks, and meansalso actuated by the energy applied through the key to restore a part ofsaid means to initial position to reengage said totaiizer and 10actuating racks.

OSCAR J. sUNDsTaaNn

